LENOVO THINKPAD T400 T500 128GB Solid State Drive SSD W/ Windows 10 Pro 64-Bit | eBay
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Lenovo ThinkPad T400 Hard Drive Replacement - iFixit Repair Guide
Amazon.com: Lenovo T400 2765-T6U 14.1-Inch ThinkPad (2.26 GHz Intel Core 2 Duo P8400 Processor, 2 GB RAM, 160 GB 7200RPM Hard Drive, XP Pro) : Electronics
Ultrabay 2nd HDD SSD Hard Drive Caddy Module for Lenovo ThinkPad T400 T500 T410 | eBay
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Another old form factor T400 project finished 2day. Win10 and SSD upgrade 😇👌🏽. : r/thinkpad
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Amazon.com: 2nd HDD SSD Hard Drive Optical Bay Caddy Adapter for Lenovo Thinkpad T400 T410si T410i T420si T430si and x200 x201 x220 UltraBase : Electronics